now it only on `condition` parameter which implements their
own logic, including checking for permission =)

    If users language setting is different from default app language setting, front end app language should change to user's language once user login
2. Fix the wrong language display in the view of  accountProfile.

Add the ability to set the default language for new users.
Admin can set server default language in admin/General section.

This fixes the issue https://github.com/RocketChat/Rocket.Chat/issues/1623

So basically if a user login from a new machine and the language loaded from their profile is different from the local one then set the correct language and if it is an RTL language set the RTL class immediately.

This makes message rendering much more self-contained and Meteor-like.